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Unified Family: MLE Scale
Boundary shape function unifies families of stopping rules
–Wang & Tsiatis (1987) based families
•O’Brien & Fleming (1979); Pocock (1977)
•Also used by Emerson & Fleming (1989); Pampallona & Tsiatis (1994)
–Triangular test (Whitehead, 1983)
–Seq cond probability ratio test (Xiong & Tan, 1994)
–Conditional or predictive power
–Peto-Haybittle (using Burington & Emerson, 2003)